Description
A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.20), SICORE Base system (All versions < V26.20.0). The affected application ships with a default configuration that disables all OPC UA security mechanisms. This could allow an attacker to gain unauthorized access and control over critical system functions.
Published: 2026-07-09
Score: 6.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 16 Jul 2026 20:15:00 +0000

Type Values Removed Values Added
Title Disabled OPC UA Security Allows Unauthorized Access to Siemens CPCI85 and SICORE Base System

Wed, 15 Jul 2026 14:00:00 +0000

Type Values Removed Values Added
Title Unauthorized Access via Disabled OPC UA Security in Siemens CPCI85 and SICORE Systems

Tue, 14 Jul 2026 04:30:00 +0000

Type Values Removed Values Added
Title Unauthorized Access via Disabled OPC UA Security in Siemens CPCI85 and SICORE Systems

Mon, 13 Jul 2026 07:30:00 +0000

Type Values Removed Values Added
Title Unsecured OPC UA Default Configuration in Siemens CPCI85 and SICORE Systems

Sun, 12 Jul 2026 07:15:00 +0000

Type Values Removed Values Added
Title Unsecured OPC UA Default Configuration in Siemens CPCI85 and SICORE Systems

Sat, 11 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Title OPC UA Security Disabled Enables Unauthorized Access in Siemens CPCI85 and SICORE

Fri, 10 Jul 2026 14:00:00 +0000

Type Values Removed Values Added
Title OPC UA Security Disabled Enables Unauthorized Access in Siemens CPCI85 and SICORE

Thu, 09 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 09 Jul 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Siemens
Siemens cpci85 Central Processing\/communication
Siemens sicore Base System
Vendors & Products Siemens
Siemens cpci85 Central Processing\/communication
Siemens sicore Base System

Thu, 09 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Description A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.20), SICORE Base system (All versions < V26.20.0). The affected application ships with a default configuration that disables all OPC UA security mechanisms. This could allow an attacker to gain unauthorized access and control over critical system functions.
Weaknesses CWE-1188
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Siemens Cpci85 Central Processing\/communication Sicore Base System
cve-icon MITRE

Status: PUBLISHED

Assigner: siemens

Published:

Updated: 2026-07-09T14:45:11.451Z

Reserved: 2026-06-16T07:47:12.274Z

Link: CVE-2026-54800

cve-icon Vulnrichment

Updated: 2026-07-09T14:45:05.272Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-16T20:00:06Z

Weaknesses